Experts told me in 2016, that the current Embarcadero C/C++ compiler is still more-or-less on the C++ language level of “Borland C/C++” of 1998, or so...., i.e. not on C++ language level C11 or even C17.

VaulTec "MinGW Developer Studio" - “As an effort to keep MinGW Developer Studio alive, I have created updated installers for MinGW Developer Studio 2.05 for Windows with a newer version of the MinGW compiler system and ResEd resource editor”.